post to server using controls or code other than a button

[Ken Cox [Microsoft MVP]]

Don't forget that the client-side script has a Submit() method that can submit
a form without a button.

In the following code, I use a literal control to output the Javascript the
first time. The Javascript inserts the time into the textbox and then submits
the form. When the page reloads, it displays the time as accepted by the
textbox and the time of the postback.

Private Sub Page_Load _
(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
If Not IsPostBack Then
Literal1.Text = "<script>document.forms[0].TextBox1.value=" & _
"'" & Now.TimeOfDay.ToString & "';document.forms[0].submit();</script>"
Else
Label2.Text = "I was posted back at: " & Now.TimeOfDay.ToString
Literal1.Text = ""
End If
Label1.Text = TextBox1.Text
End Sub

Does this help?

Ken
MVP [ASP.NET]


"Northern" <lifeng26@msn.com> wrote in message
news:055901c3515d$1ec2ff10$a001280a@phx.gbl...
If I have a button control that runat=server, then as soon
as user clicks on the button, server side event handler
get invoked. I want to have a effect that's similar to
that, but with other controls. Say, I have a text field.
What I want is, as soon as my front-end script put a
string into the text field the form get posted to the
server and the server side Text changed event get fired.

Right now, I don't seem to be able to do that. The text
change on the front-end doesn't trigger a server post. I
have to wait untill next time some button get pressed then
the server side detects the changed text and fires my text
change event handler. This doesn't work for me.

Can someone show me how to do this?

Thanks.

[Ken Cox [Microsoft MVP]]

BTW, is Northern your real name? If not, it is polite to sign with one.

"Northern" <lifeng26@msn.com> wrote in message
news:055901c3515d$1ec2ff10$a001280a@phx.gbl...
If I have a button control that runat=server, then as soon
as user clicks on the button, server side event handler
get invoked. I want to have a effect that's similar to
that, but with other controls. Say, I have a text field.
What I want is, as soon as my front-end script put a
string into the text field the form get posted to the
server and the server side Text changed event get fired.

Right now, I don't seem to be able to do that. The text
change on the front-end doesn't trigger a server post. I
have to wait untill next time some button get pressed then
the server side detects the changed text and fires my text
change event handler. This doesn't work for me.

Can someone show me how to do this?

Thanks.

[John Kievlan]

Make sure you set AutoPostBack=true for the control in
question. That should fix the problem.

>-----Original Message-----
>If I have a button control that runat=server, then as

soon

>as user clicks on the button, server side event handler
>get invoked. I want to have a effect that's similar to
>that, but with other controls. Say, I have a text field.
>What I want is, as soon as my front-end script put a
>string into the text field the form get posted to the
>server and the server side Text changed event get fired.
>
>Right now, I don't seem to be able to do that. The text
>change on the front-end doesn't trigger a server post. I
>have to wait untill next time some button get pressed

then

>the server side detects the changed text and fires my

text

>change event handler. This doesn't work for me.
>
>Can someone show me how to do this?
>
>Thanks.
>.
>